Transmission-gearing.



C- W. PARKER.

TRANSMISSION'GEARIN'G.

APPLTcATloN mw MAY 2T, T9T'2. Y 1,205,383. Patented Nov. 21, 1916.

3 SHEETS-SHEET 2.

WITN ESSES:

ATTORNEYS C. W. PARKER.

TRANSMISSION GEARING.

` APPLICATION FILED MAY27|1912 1,205,383. Patented Nov. 21, 1916.

3 SHEETS-SHEET 3.

UNITED sTATEs APATENT oEEioE.

CLARK PARKER, F FULTON, NEW YORK, ASSIGNOR, BY MESNE ASSIGNMENTS, T0JAMES H. DUNN, 0F SPRINGFIELD, MASSACHUSETTS.

i TRANSMISSION-GEARING.

and useful Transmission-Gearing, of which' the following is aspecification.

This invention relates to transmission gearing, particularly applicablefor motor vehicles, and has for its object particularly simple andefficient meansA for shifting toothed power-transmitting parts of thegearing and for lockingI such parts 'from movement when in their neutralor in their shifted positions, and the invention consists in thecombinations and constructions hereinafter set forth and claimed.

In describing this invention reference -is had to the accompanyingdrawing in which like characters parts in all the views.

Figure 1 is a transverse sectional view of one embodiment of my gearing.Figs. 2A

and 3 are detail views, partly in section, of one of the shifters andcoacting parts, illustrating the operation ofthe fork lever and one formof yielding means for forcing shiftable toothed power-transmittingmembers of the gearing into interlocking engagement, the parts beingshown as operating` in Fig. 2, and as completely operated in Fig.y 3.Fig. 4 is a detail view of the central or main shifter or carriage andcontiguous parts, in neutral position. Fig. 5 is a plan of the carriageor shifter shown in Fig. 4. Fig. 6 is a sectional view, partly inelevation, on line A-Af Fig. 4, the- 'power-transmitting members shownin Fig.

4, being omitted. Fig. 7 is a fragmentary view of` a portion of thegearing illustrating the means for locking the main clutch member frommovement. Fig. 8 is adetail view illustrating the means for operatingthe locking means shown in Fig. 7 the contiguous portion of the frame ofa motor car equipped with my invention, being also shown. Figs. 9 and 10are plan and edge views, respectively, ofthe locking member.

This transmission gearing includes, geni -erall shiftable toothedpower-transmittingl mem ers orparts, Shifters connected respectively tosaid members, means for actuating the Shifters comprising an axiallmovable rock shaft having a plurality o arms for coacting with theShifters, the arms being spaced apart to select two predeterminedSpecification of Letters Patent.

designate corresponding n o f to lock the unselected Shifters, and means'for locklng the main shifter from movement, and also means foryieldingly forcing the shlftable toothed power-transmitting members orparts into interlocking engagement with their companion members. l A

The transmission Agearing here illustrated comprises a driving elementor shaft 1 and a driven element or shaft 2, Fig. 4, arranged 1n axialalinement, a plurality of intermediate shafts 3, 4, 5, Fig. 1, forproducing intermediate, low and `reverse speeds, the shafts 3, 4 and 5being connected to the shafts 1, 2 by gears, as 6, which are always 1nmesh, and some of which are loose on vtheir shafts and are connectedthereto as will be presently described, and means for connecting thevarious shafts in driving relationto the driving element 1.

, The arrangement of the gearing per se forms no part of this inventionand it is thought that further description thereof is unnecessary.

.jaws on each of the shafts 4, 5, such as the clutch jaws 10 and 11,Figs. 2 arid 3. The

clutch jaw 7 is movable in one direction to [95. the left intoengagement with the jaw 8 to produce direct drive or high speed, and inthe opposite direction into engagement with the jaw 9 to act inconjunction with the jaws 10 and 11 on the intermediate shaft 3,! andproduce intermediate speed. The cen-v tral or main shiftable jaw 7 isalways shift- Patented Nov. 21,1916.

I Application filed May 27, 1912. l Serial No. 699,931.

ed'into engagement with the jaw 9 when the` shiftable jaw l1 on any ofthe intermediate shafts "3, 4 or 5 is operated. Thus the cen-l tral ormain jawl is coupled with-any one of the movable jaws on theintermediate shafts. As seen in Figs. 2 and 3, the clutch jaws areshiftable and move into and out of engagement with their companion jawsby sliding ,110

shifters or carriages 12 suitably supported in guides formed in the case13 of the gearing, and fork levers' 14 pivoted to the carriages 12 andnormally movable as a unit therewith, and being connected to theshiftable clutch jaws 7 and 11, and being normally' held from pivotalmovement by springs which are tensioned during pivotal movement of thelevers.

. which is mounted a slidable plunger 19 arranged eccentric to the aXisof the shifter 12, the plunger bearing against one end of the lever 14and being held in engagement with the lever by a spring 20 encirclingthe plunger 19 and interposed between the inner face of one of the ears18 and an annular flange or collar 21 on a sleeve 22 on the plunger 19,the sleeve 22 abutting against the -annular end face of a head 23 on theplunger.

The spring 2O acting-on each plunger 19 tends to hold the lever 14against an abutment 24 at one end of the slot 17 of the shifter foreachl jaw 11, Figs. 2 and 3, and normally the carriage 12 and lever 14act as a unitbut in case the ends of 4the teeth of the clutch jaw 11should strike against the ends of the teeth of the jaw 10, as seen inFig. 2, the spring 20 will yield during con' tin-ued movement of thecarriage 12 from the position indicated in dotted lines to that shown infull lines, Fig. 2, and will be tensioned so as to force the teeth ofthe jaw 11 into interlocking engagement with the teeth of the jaw 10, asshown in Fig. 3, when one of the jaws 10 or 11 has turned sufficientlyto aline the teeth of the one with the spaces of the other. The ends ofthe teeth of the jaws 10 and 11 are preferably formed inclined asindicated at 25 in order to permit ratcheting in case the driving jaw isrotating too fast to permit the other jaw to move into interlockingengagement therewith. As the jaw 7 lof the central or main clutch isshiftable in opposite directions, two springs 20, Fig. 4, are providedfor acting on the lever 14 in opposite directions.

As here show n, Figs. 4 and 5, the slide 12 for the central or main jawis formed with ears 26 at opposite ends of the slot 17 therein, theseears supporting a fixed guide rod 27 on which is mounted the sleeves2,2, the sleeves being pressed toward each other by the springs 2G whichare located between the annular flanges 21 on the sleeves 22 and theears 26 respectively. One of the sleeves 22 is mounted on an elongatedhead at one end of the guide rod 27, the inner end face of which formsan annular shoulder 28 facing the other end of the guide rod 27; and theother sleeve 22 is mounted on-an additional sleeve 29 mounted on a partof less diameter of the rod 27 and abutting at one end against one ofthe ears 26 and having its other end formed with an enlarged head 30abutting against the shoulder 28, said head 30 beingdisposed centrallyof the rod 27 and the sleeves\22 abutting against opposite end faces ofsuch head. The sleeves 22 are thus limited in their movement toward eachother by their springs 20, so that one spring 20 may be of greaterstrength than the other, the spring for forcing the clutch jaws 7 intoengagement with the jaw 8 to produce direct drive being strongerandacting quicker than the other spring 20. The fork lever 14 for thecentral clutch is forked, as at 31, at its upper end, as well as at itslower end, the fork 31 extending on opposite sides of the head 30 of thesleeve 29 and engaging opposing faces of the flanges 21 of the sleeves22. The shifter 12 for the central or main clutch, as shown in Fig. 4,is movable in opposite directions from a neutral position, and one ofthe springs 20 thereof is arranged to yield when the shifter is moved inone direction and the teeth of the clutches 7, 8 clash at their ends,and the other spring 20 will yield when the shifter is moved in theopposite direction and the teeth of the clutches 7, 9 clash at theirends.

As before stated, the jaws 7, 8 produceA high speed forward, or directdrive, and, preferably, the entrance of the Vteeth'of the clutch 8 areformed stepped, as shown at 32, for facilitating the engagement of theteeth especially when the jaw 7 is turning at high speed, as when thecar is coasting down hill with the engine dead, and t is desired tostart the ,engine as the car approaches the bottom ofA the hill, byclutching the driving shaft 1 which is connected to the engine shaft, aswill be understood by those skilled in the art, with the clutch jaw 7which is rotating by reason of the fact that it is being driven from therear wheels of the car.

In starting the engine as described, it is necessary that the clutches7, 8 be interengaged instantly, for if ratcheting is permitted, the carwill in most cases have slowed down to too low 'a speed before ,the jawsinterengage, so that the added resistance of cranking the engine willact as a brake on the car and stop the same before the engine shaft hasbeen turned suiliciently to draw fresh charges of gas into thecylinders. The step ed teeth of the clutch jaw are also particu arlyadvantageous when it is desired, or necessary for any reason, to use thecompression ofthe engine as a braking force, as in the middle of a hillwhen coastin with the engine dead, as Vthe clutch jaw can be instantlyengaged and the braking action brought into effect immediately.

Each lever 14 is pivoted to its shifter by means of the pivot 15consisting of a sleeve and a locking pin t33, the sleeve extendingthrough openings in the depending ears 16 and through the lever andhaving a head 34 at one end for engaging the outer face of one of saidears, and the locking pin 33 extending through the sleeve from the otherend thereof, and having a head 35 at one end abutting against the outerface of the other of such depending ears 16, the pin having spring armsformed with shoulders 36 at their ends, which interlock with the head ofthe sleeve, as shown in Fig. 6, and lock the pin in the sleeve. Thus thehead 34 of the sleeve and the head 35 of the locking pin hold the pivotin position.

The means for actuating the Shifters comprises an axially movable rockshaft 37 journaled in bearings 38 in the case 13 and arranged crosswiseof, and above, the Shifters 12, the shaft having a plurality of arms 39,40, 41 thereon for selecting predetermined Shifters during the axialmovements of the shaft and actuating the vselected Shifters during therocking lof the shaft, such arms having means for entering transversenotches 42 in arms 43 of the Shifters.

The shifter 12 connected to the central or main clutch jaw 7 is alwayscoupled with one of the other Shifters, and the arm 39 is formed with anelongated engaging end 44 of sufficient length to be always engaged withthe arm 43 of the central or main shifter'12 during al1 axial positionsof the rock shaft 37. `The 'other arms 40, 41 are so spaced that oneonly is engaged at any time with one ofthe other Shifters. As here shownthe arm 41 is common to the Shifters' producing low and reverse speeds,that is, the Shifters operating the movable clutch jaws on the shafts 4,5, Fig, l, and such arm normally occupies a neutral position between thearms 43 of Such Shifters, and

'shifts from its neutral position in one direction into engagement withone of its companion Shifters, and in the other direction intoengagement with the other of its companion Shifters. The remaining arm40 is arranged to be normally engaged with the arm 43 of the shifterproducing intermediate speed (that is the shifter operating the clutchvon the shaft 3) when the arm 41 is in'neutral position, and to be out ofengagement with such shifter when the arm 41 is engaged with either ofits companion Shifters.

The rock shaft 37 is movable axially in one direction against the actionof. the

spring 45, and such shaft is operated by asuitable control levermechanism, several forms of which are Well known to those skilled in theart. However, I have a special form of control lever which forms thesubject matter of another application Sr. No. 699,383, filed May 24,1912, but so far as this invention is concerned any lever or meanscapable of lproducing axial and rotary movements of the shaft may beemployed.

The means for lockingl the unselected Shifters from movement comprises alocking plate 46 Slidable in suitable guideways in the case 13 andconnected to the shaft 37 to slide axially therewith, said plate being'formed with depending locking shoulders 47 spaced apart and relativelylocated to enter the notches 42 of the arms43 of the Shifters, twoshoulders 47 being provided to lock the shifter operating the clutch onthe shaft 3, one of these two shoulders being located to lock suchshifter when the arm 41 engages one of its-companion Shifters, and theother of such twoshoulders being located toengage such shifter When thearm 41 is shifted in the opposite direction to e'ngage its othershifter. The sliding plate 46 is connected to the rock shaft by the arm40 which slidably Works fore and aft in a slot 48, Fig. 9, in suchmember 46. The slots 49 through which the other arms 40 and 41 eX- tendare enlarged in order to permit the enlarged engaging ends of said armsto pass through said plate 46.

The main shifter is normally locked from movement` by a rock shaft 50,Fig. 7, journaled in the case 13 and having a rock arm 51 on the outsideof the case and a rock arm 52 on the inside thereof, the rock arm 52coacting with means as anupwardly extending arm 53, Figs. 5,7 and 8,0nthe main shifter, the rock arm 52l being here shown as having ribs 54 onone side face thereof forming a groove-in which Works a in 55 carried bysaid arm 53, the pin 55 belng located between the ribs when the clutch 7is in neutral position as shown in Fig. 8. Upon the rocking of the arm52 upwardly, and the shifting of the main shifter to carry the jaw 7into engagement with the jaw 9, the pin 55 on said arm 53 is moved intoposition to come in front of one rib 54 when the arm 52 is returned toits'position shown in Fig. 8; and upon the shifting of the mainshifterto carry the jaw 7 into engagement with the jaw 8, said pin 55 is movedinto position to engage the rear side of the other rib 54. The rockshaft 50 isactuated to move the rock arm 52 out of engagement with thepin 55 on the arm 53, by means of a pedal 56 ordinarily utilized inmotor cars, to release the multiple disk clutch, the pedal being mountedon the side sill of the car i and being connected to the rock arm 53 bymeans of a link 57 connecting the arm 58 associated with the pedal to acoupling lever 59 mounted on a rock shaft 60, the lever 59 having an arm61 which is connected to the rock arm 51 by a link 62. The rock shaft 60is provided with the usual yoke 63 which operates the movable abutmentmember of the disk clutch and is connected thereto by forks as the fork64. Obviously the clutch jaws cannot be shifted until the pedal 56 isoperated.l The rock arm 52 extends under the lock plate 4:6 and movesacross theplane of movement thereof, and in order that the arm 52 maymove upwardly out of engagement with the pin 55 of the shifter arm 53,the plate 46 is formed with an arched or offset portion 65, Fig. 9.

This gearing is particularly advantageous in that one rock Shaft isprovided for selecting and shifting any two shiftable members, and inthat a simple one piece lock is prov vided for holding the unselectedshifting parts from shifting movement, and further in that the shiftabletoothed parts are yieldingly forced to operative position.

What I claim is:

1. Ina transmission gearing, a plurality of Shiftable members, Shiftersconnected respectively to said members, and means for actuating theShifters comprising an axially movable rock shaft having a plurality ofarms for coacting with the Shifters, the arms being spaced apart toselect two predetermined Shifters upon predetermined axial movements ofthe rock shaft and to move the selected Shifters when the shaft isrocked, substantially as and for the purpose described.

2. In a ,transmission gearing, a main shiftable member and a pluralityof additional shiftable members, the main shiftable member acting inconjunction with any one of the additional shiftable members, Shiftersassociated respectively with said members, and means for selecting andactuating the Shifters comprising an axially movable rock shaft having arock arm for actuating the shifter of the main member in all the axialpositions of the rock shaft and additional rock arms located so that butone of said arms is effectively engaged with any of the additionalShifters in any axial position of the rock shaft, substantially as andfor the purpose specified.

3. In a transmission gearing, a mam shiftable member and a plurality ofadditional shiftable members, the main shiftable member acting'inconjunction withl any one of the additional shiftable members, Shiftersassociated respectively with said members, and means for selecting andactuatingl the Shifters comprising an axially movable rock shaft havinga rock arm for actuating the shifter of the main member in all the axialpositions of the rck shaft.

and additional rockarms located so that but one of said arms iseffectively engaged with any of the additional Shifters in any axialposition of the rock shaft, one of the and means for selecting andactuating the Shifters comprising an axially movable rock shaft having arock arm for actuating the shifter of the main member in all the axialpositions of the rock shaft and additional rock arms located so that butone of said' arms is effectively engaged with any of the additionalShifters in any axial position of the rock shaft, one of the additionalrock arms being common to two of the additional Shifters and having aneutral 'position between said two Shifters, and another of suchadditional rock arms being arranged to'engage its shifter when theformer additional rock arm is in neutral position, and to be disengagedtherefrom when the rock arm common to said two Shifters is engaged witheither of its coacting Shifters, substantially as and for the purposedescribed.

5. In a transmission gearing, a main shiftable member, and threeadditlonal Shiftable members, the main member acting in conjunction withany one of the additional members, or alone, Shifters associatedrespectively with Said members, and means for selecting and actuatingthe Shifters comprising an axially movable rock shaft having a main rockarm for actuating the shifter associated with the main member at alltimes, and two additional rock arms, one of the additional rock armsactuating one of the Shifters, and the` other rock arm ,being common totwo Shifters and being normally in neutral position between said two ofthe Shifters when the former additional rock arm is engaged with itscompanion shifter, substantially as and for the purpose described. l

6` In a transmission gearing, a plurality of shiftable members, Shiftersconnected respectively to said members, means for actuating the Shifterscomprising an axially movable rock shaft mounted in bearings secured tothe gearing-case and having a plurality of operating arms, said rockShaft having two movements, one for selecting and the other for movingthe selected Shifter,

and a locking element separate from thev rock shaft and operable by therock shaft only during the selecting movement thereof, said lockingelement operating to lock the unselected Shifters during the Shiftingmovement of the rock shaft, substantially as and for the purposedescribed.

7. In a transmission gearing, a support formed with a guide, a pluralityof shiftable members, Shifters connected respectively, to said members,means for actuating the Shifters comprising an axially movable rockShaft mounted in bearings secured to the gearing-case and having meansprojecting therefrom and coacting with the shiftable members, the rockShaft being movable axially for selecting the member to be shifted,

'and about its axis for shifting the selected inember, and a slidinglocking element for locking the unselected shifter, said element beingmovable in the guide, and connected to the rock shaft to Slide axiallytherewith, Said guide preventing movement of the locking element duringthe rocking of said shaft, iubstantially as and for the purpose Speci-8. In a transmission gearing, a plurality of shiftable members, Shiftersconnected re-v spectively to Said members, means for actuating theShifters comprising an axially movable rock shaft having a plurality ofarms for coacting with the Shifters, the arms being spaced apart toselect two predetermined Shifters upon predetermined axial movements oftherock shaft, and a locking p elementoperated by the rock shaft duringaxial movements thereof to lock the unselected Shifters, substantiallyas and for the purpose set forth. j A

9. In a transmission gearing, a plurality of shiftable members, Shiftersconnected respectively to Said members, means for'actuating the Shifterscomprising an axially movable rock shaft having a plurality of arms forcoacting with the'shifters,` thel arms being spaced lapart to Select twopredetermined Shifters upon predetermined axial movements of the rockshaft, and a locking element loperated by the rock Shaft during axialmovements thereof to lock the unselected Shifters, the locking elementcompris# ing a sliding plate connected to the rock shaft to v.slideaxially therewith, Said plate being formed with Shoulders spaced aparttocoact with the unselected Shifters and release the Selected Shifters,Substantially as and Afor thepurpose described.

10. In a transmission gearing, a lmain shiftable member and a pluralityof additional shiftable members, the main'shiftable member acting inconjunction with any one of the additional shiftable members, Shifters.associated respectively with said members, v

means for selecting and actuating the Shifters comprising an axiallymovable rock Shaft having a rock arm .for actuating theshifter of themain member in all the axial positions of the rock Shaft, and additionalrock arms located so that but one of Said arms isefec-` v ingA shouldersspaced apart for lcoacting Eshiftable member. and a plurality ofadditional shiftable members, the main shiftable member acting inconjunction with any one of the additional shiftable members, Shiftersassociated respectively with said members, means for selecting andactuating the shifters comprising an axially movable rock shaft having arock arm for actuating the Shifter of the main member in all the axialpositions of the rock Shaft, and additional rock arms, one of theadditional rock arms being common to tWo of the additional Shifters andhaving a neutral position between Said two Shifters, and another of suchadditional rock arms being arranged to engage its Shifter when theformer additional rock arm iS in neutral position, and to be disengagedthere' from when Such former rock arm is engaged. with either of itscoacting Shifters, and a slidable locking element connected to the shaftto move axially therewith, the locking element having shoulders spacedapart for coacting with said two additional Shifters when thecorresponding rock arm is in neutral position, and the locking elementalso having additional Shoulders spaced apart and arranged t0 engage andlock the remaining additional Ishifter when either one of Said twoShifters iS Selected, Substantially as' and for the purpose Set forth.

12. In a transmission gearing, a plurality of shiftable members,Shifters connected, respectively, to said members, means for actuatingthe Shifters comprising an axially movable rock 'Shaft having aplurality of arms, Said rock Shaft having two movements, one forselecting and the other for movingthe selected Shifters, and a lockingelement for locking the unselected Shifters during the shifting movementof the rock shaft, and means connecting the rock Shaft and the lockingelement, Said means coacting with the locking element during theselecting movement of the rock Shaft and moving said element with therock shaft, and Said meansbeing movable independently of the lockingelement during the Shifting movement of the rock shaft, Substantially asand for the purpose specified.

13.- In a transmission gearing, a plurality of shiftable members,Shifters connected, re-

rock shaft substantially parallel with the rock shaft and formed withslots for receiving said arms and permitting the same to moveindependently of the locking plate, and With an additional transverseslot, said plate having its face contiguous to the shifters providedwith shoulders for coacting with the unselected Shifters, and anadditional arm projecting from the rock shaft and coacting with theopposite side of the additional slot in the locking plate during theselecting movement of the rock shaft and movablelengthvvise of saidsides independ- 1 ently of the locking plate during the shiftingmovement of said rock shaft, substantially as and for the purpose setforth.

14. In a transmission gearing, shiftable members, Shifters-connectedrespectively to said members, means for selecting and actuating theShifters, a movable locking element for holding the unselected Shifterscontrolled in its operation by said means, and means for normallylocking the Shifters from movement comprising a rock shaft, and a rockarm extending contiguous to the locking element and movable across theplane of the movement of the locking element, said element being formedWith an offset portion for permitting the movement of said rock shaft,substantially as and for the purpose described.

15. If a transmission gearing, a main shiftable power-transmittingmember, and a plurality of additional poirier-transmitting members, themain member acting in conj unctim with any of the additional shiftablemembers, shifters ass;,. f.ated respectively with said members, manuallyoperable means for selecting a'predetermined additional shifter and foractuating the selected shifter and the main shifter, and means forlocking the mainl shifter' from movement, substantially as and for thepurpose specified. i

16. Ina transmission gearing, a main shiftable power-transmittingmember, a plurality of additional power-transmitting members, the mainmember acting in con-- junction With any of the additional shiftablemembers, Shifters-associated with said members, manually operable meansfor selecting a predetermined additional shifter and for actuating theselected shifter together with the main shifter, and means operated bythe selecting and shifting` means during the selecting operation thereofto lock the unselected Shifters, manually operable means for normallylocking the main shifter from movement, and a controlling leverconnected to the last-mentioned locking means, substantially as and forthe purpose set forth.

17. In 'a transmission gearing, a shiftable power-transmitting member,and a `plurality of additional power-transmitting lected shifter and themain shifter, and

means for locking the main shifter from movement, the last-mentionedmeans comprising a shoulder associated With the main shifter, a rockshaft having an arm formed With means for interlocking with saidshoulder, and a control lever connected to the rock shaft, substantiallyas and for the purpose described.

18. In a transmission gearing, a main shiftable power-transmittingmember, a plurality of additional power-transmitting members, the mainmember acting in conjunction with any of the additional shiftable.members, Shifters associated with said members, manually operable meansfor selecting a predetermined additional shifter and for actuating theselected shifter together with the main shifter, means operated by theselecting and shifting means during the selecting operation thereof tolock the unselected Shifters, and `means for normally locking the Ina-inshifter from movement, the last mentioned means comprising a shoulderassociated vvith the main shifter, a rock shaft having an arm providedwith means for interlocking with the shoulder, and a manually operablecontrol lever connected to the rock shaft, substantially as and for thepurpose specified.l

19. In a transmission gearing, a plurality of shiftable members,Shifters, manually 0perablemeans for selecting and actuating saidShifters comprising an axiallyy movable rock shaft having a plurality ofarms for coacting with the-Shifters, the arms being spaced apart toselect two predetermined Shifters upon predetermined axial movements ofthe rock shaft, a locking element operated by the rock shaft, during theaxial movements thereof to lock the unselected Shifters, means fornormally locking the main shifter from movement, and a manually-operablecontrol lever. for operating the last-mentioned means, substantially asand for the purpose set forth.

20. In a' transmission gearing, a shiftable member, and means forshifting said member including a movable carriage, a lever pivoted tosaid carriage and connected to the shiftable member, and a springcarried loo pa,irs of toothed power transmitting members, one member ofeach pair being shiftable into and out of interlocking engagement withthe other member of said pair, means for shifting the shiftable membersof the pairs including Shifters associated respectively, with the pairs,a common actuator for the Shifters, means for transmitting the motion ofthe Shifters to the shiftable members including movable parts carried bythe Shifters, and springs for yieldingly holding said parts frommovement -relatively to the Shifters, Substantially as and for thepurpose specified.

22. The combination of a plurality of pairs of toothedpower-transmitting members, one member of each pair being shiftable intoand out of interlocking engagement with the other member of suchpair,

means for shifting the shiftable members including Shifters for theshiftable members, respectively, fork levers pivoted to the shifters andconnected t0 the shiftable members, springs carried by the Shifters andacting on the'fork levers permitting the fork levers to yield during themovement of the Shifters to engage the members of the pairs, and acommon actuator for the Shifters, substantially as and for the purposeset forth.

23. The combination of a plurality of pairs of toothedpower-transmitting members, one member of each pair being shiftable intoand out of interlocking engagement with the other member of said pair,means for shifting the shiftable members of the pairs including Shiftersassociated respectively with the pairs, a common actuator for theShifters, means for transmitting the motion of the Shifters to theshiftable members including movable parts carried respectively by SaidShifters, springs for yieldingly holding Said parts from movementrelatively to the Shifters, said parts comprising levers pivoted betweentheir ends to the Shifters respectively, one arm of each lever beingconnected to one of the shiftable toothed members, and a Spring carriedby each shifter and acting on the other 'arm of the lever, Substantiallyas and for the purpose described.-

24. The combination of a plurality of pairs of toothedpower-transmitting members, one member of each pair being shiftable intoand out of interlocking engagement with the other member of said pair,means for shifting the shiftable members of the pairs including Shiftersassociated respectively with the pairs, a common actuator for theShifters, means for transmitting the motion of the Shifters to theshiftable members including movable parts carried respectively by saidShifters, Said parts comprising levers pivoted between their ends to theShifters, one arm of each lever being connected to one of the shiftabletoothed members, and a Spring carried by each shifter and acting on theother arm of the companion lever, and each shifter being formed with anabutment against which the spring normally holds the associated lever,Substantially as and for the purpose specified.

25. The combination of a plurality of pairs of toothedpower-transmitting members, one member of each pair being shiftable intoand out of interlocking engagement with the other member of Said pair,means for shifting the shiftable members of the pairs including Shiftersassociated respectively with the pairs, a common actuator for theShifters, means for transmitting the motion of the Shifters to theshiftable members including movable parts carried respectively by saidShifters, said parts comprising levers pivoted between their ends to theShifters, one arm of each lever being connected to one of the shiftabletoothed members, and a spring carried by each shifter and acting on theother arm of the associated lever, said spring being arranged parallelto the Shifters, substantially as and for the purpose set forth.

In testimony whereof, I have hereunto signed my name in the presence oftwo attesting witnesses, at Syracuse, in the county of Onondaga., in theState of New York, this 17th day of April, 1912.

CLARK W. PARKER.

1Witnesses:

S. DAVIS, L. M. DAVIS.

